Scout 800 M/C to use?

Discussion in 'The Machine Shop' started by Don B, Jan 10, 2019.


  1. Don B

    Don B Farmall Cub

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    New to scouts but picked up a 67' scout 800 with a 152 and it has the large brake drums. I have to redo almost every system and I will be starting with the brakes. I want to upgrade to a dual master cylinder but noted that some seem to dislike the 1" bore M/C due to soft brakes. The original single M/C has a 7/8" bore so perhaps that would be a better way to go just in a dual configuration.

    Any help/comments would be great.

    Thanks,

    Don B.
     
  2. Greg R

    Greg R Dreams of Cub Cadets

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    I believe the original dual circuit brakes on the 800s came with a step bore MC, that being 1 X 7/8. The front WC were 1" and the rears were 7/8". Those MCs are no longer available. I still have the original and it works fine for braking effort. A lot of folks went with the 7/8 MC and have reported good results. The hard part is the plumbing finding one with engine side ports which makes the tube bending a lot easier. Get an extra 10 feet of tubing in each size to practice on if you haven't done it.
     
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  3. Don B

    Don B Farmall Cub

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    So maybe I'll just go with the 7/8" set-up. I believe a 1980 ford fairmont has the right bore and the ports are on the right (passenger side) as well. I'll have to check the underside as I might need clearance for my clutch mechanical linkage. I'm wondering what other M/C's others have used with the 7/8" bore then?
     
  4. Joe Hurley

    Joe Hurley Farmall Cub

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    I put one in from a 74 jeep with 4 wheel drums. I also put in an adjustable prop valve. Works great.
     
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  5. Greg R

    Greg R Dreams of Cub Cadets

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    What does a proportional valve on an all drum setup do for you? I know they're needed on disc/drum, but I don't see a need on drum/drum.
     
  6. Joe Hurley

    Joe Hurley Farmall Cub

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    It does the same thing as it would with a disc/drum setup. It'll reduce the pressure to the rear to help keep them from locking up under hard braking. Any 4 wheel drum rig will benefit from one.

    I'm not sure when prop valves showed up but even a 4 wheel disc rig will have a prop valve.
     
  7. Don B

    Don B Farmall Cub

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    The plan is to include a wilwood prop valve.
     
  8. Greg R

    Greg R Dreams of Cub Cadets

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    It's good to figure what's there for stock. They don't come broke from the factory and brakes were usually balanced for weight and weight shift already with drum and wheel cylinder sizing.
     
  9. Joe Hurley

    Joe Hurley Farmall Cub

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    Auto technology didn't peak 50 yrs ago either. It's an improvement much the same way upgrading from points is..:whistling:
     
  10. Cheese1

    Cheese1 Farmall Cub

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  11. Greg R

    Greg R Dreams of Cub Cadets

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    True. But I can't count those who've gone to re-invent the wheel and don't know pi. Basic don't change. Now a proportional valve modulated by ride height, that would be truly cool.
     

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